The History of The Bosses Who I know

1) The first is : XuHong . He sales machines made from Janpan, then he gets the assembly code of the controller by debuging. At last ,he begin to make his own machine。

2) The second is: ZhangYouCheng. He is a teacher of a university.He masters a type of core technonoly. He develop a produce named restorable card。

3) The third is : TangDong. He sales HMI made  from taiwan. then He hire a  engineer who get the core technology by some way. At last, he begin to make his own HMI.